Journal
SCIENTIFIC REPORTS
Volume 6, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/srep20474
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Funding
- European Union [604391]
- Italian Ministry of Education, University, and Research (MIUR) through the program FIRB - Futuro in Ricerca [2010 RBFR10LULP]
- European Union through the MPNS COST ActionTERA-MIR Radiation: Materials, Generation, Detection and Applications [MP1204]
- ANR P2N NADIA Integrated NAno-Detectors for terahertz Applications [ANR-13-NANO-0008]
- National Science Poland Centre [DEC-2013/10/M/ST3/00705]
- NSF/LA-SiGMA program [EPS-1003897]
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The ability to convert light into an electrical signal with high efficiencies and controllable dynamics, is a major need in photonics and optoelectronics. In the Terahertz (THz) frequency range, with its exceptional application possibilities in high data rate wireless communications, security, night-vision, biomedical or video-imaging and gas sensing, detection technologies providing efficiency and sensitivity performances that can be engineered from scratch, remain elusive. Here, by exploiting the inherent electrical and thermal in-plane anisotropy of a flexible thin flake of black-phosphorus (BP), we devise plasma-wave, thermoelectric and bolometric nano-detectors with a selective, switchable and controllable operating mechanism. All devices operates at room-temperature and are integrated on-chip with planar nanoantennas, which provide remarkable efficiencies through light-harvesting in the strongly sub-wavelength device channel. The achieved selective detection (similar to 5-8 V/W responsivity) and sensitivity performances (signal-to-noise ratio of 500), are here exploited to demonstrate the first concrete application of a phosphorus-based active THz device, for pharmaceutical and quality control imaging of macroscopic samples, in real-time and in a realistic setting.
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